ghsa-58f5-hfqc-jgch
Vulnerability from github
jose is an npm library providing a number of cryptographic operations.
Impact
AES_CBC_HMAC_SHA2 Algorithm (A128CBC-HS256, A192CBC-HS384, A256CBC-HS512) decryption would always execute both HMAC tag verification and CBC decryption, if either failed JWEDecryptionFailed would be thrown. But a possibly observable difference in timing when padding error would occur while decrypting the ciphertext makes a padding oracle and an adversary might be able to make use of that oracle to decrypt data without knowing the decryption key by issuing on average 128*b calls to the padding oracle (where b is the number of bytes in the ciphertext block).
Patches
All major release versions have had a patch released which ensures the HMAC tag is verified before performing CBC decryption. The fixed versions are ^1.28.1 || ^2.0.5 || >=3.11.4.
Users should upgrade their v1.x dependency to ^1.28.1, their v2.x dependency to ^2.0.5, and their v3.x dependency to ^3.11.4
Credits
Thanks to Morgan Brown of Microsoft for bringing this up and Eva Sarafianou (@esarafianou) for helping to score this advisory.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "jose"
},
"ranges": [
{
"events": [
{
"introduced": "1.0.0"
},
{
"fixed": "1.28.1"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "npm",
"name": "jose"
},
"ranges": [
{
"events": [
{
"introduced": "2.0.0"
},
{
"fixed": "2.0.5"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "npm",
"name": "jose"
},
"ranges": [
{
"events": [
{
"introduced": "3.0.0"
},
{
"fixed": "3.11.4"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2021-29443"
],
"database_specific": {
"cwe_ids": [
"CWE-203",
"CWE-696"
],
"github_reviewed": true,
"github_reviewed_at": "2021-04-16T23:01:38Z",
"nvd_published_at": "2021-04-16T18:15:00Z",
"severity": "MODERATE"
},
"details": "jose is an npm library providing a number of cryptographic operations.\n### Impact\n\n[AES_CBC_HMAC_SHA2 Algorithm](https://tools.ietf.org/html/rfc7518#section-5.2) (A128CBC-HS256, A192CBC-HS384, A256CBC-HS512) decryption would always execute both HMAC tag verification and CBC decryption, if either failed `JWEDecryptionFailed` would be thrown. But a possibly observable difference in timing when padding error would occur while decrypting the ciphertext makes a padding oracle and an adversary might be able to make use of that oracle to decrypt data without knowing the decryption key by issuing on average 128*b calls to the padding oracle (where b is the number of bytes in the ciphertext block).\n\n### Patches\n\nAll major release versions have had a patch released which ensures the HMAC tag is verified before performing CBC decryption. The fixed versions are `^1.28.1 || ^2.0.5 || \u003e=3.11.4`.\n\nUsers should upgrade their v1.x dependency to [`^1.28.1`](https://github.com/panva/jose/releases/tag/v1.28.1), their v2.x dependency to [`^2.0.5`](https://github.com/panva/jose/releases/tag/v2.0.5), and their v3.x dependency to [`^3.11.4`](https://github.com/panva/jose/releases/tag/v3.11.4)\n\n### Credits\nThanks to Morgan Brown of Microsoft for bringing this up and Eva Sarafianou (@esarafianou) for helping to score this advisory.",
"id": "GHSA-58f5-hfqc-jgch",
"modified": "2021-04-16T23:01:38Z",
"published": "2021-04-19T14:57:22Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/panva/jose/security/advisories/GHSA-58f5-hfqc-jgch"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-29443"
},
{
"type": "WEB",
"url": "https://www.npmjs.com/package/jose"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
],
"summary": "Padding Oracle Attack due to Observable Timing Discrepancy in jose"
}